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  1. The price of an antique is reduced by 20% and then this price is again reduced by 10%. The total reduction of the price is
    1. 25 %
    2. 30 %
    3. 23 %
    4. 28 %
Correct Option: D

Percentage decrease = x + y +
xy
%
100

= − 20 − 10 +
20 × 10
% = −28%
100

Second Method :
Here, D1 = 20%
D2 = 10%
Net reduction
=
D1 + D2
D1D2
%
100

= 20 + 10 −
20 × 10
%
100

= (30 – 2)% = 28%



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